Cover-fastener.



E. W. STULL.

COVER FASTENE'R. APPLICATION nnnnmn. a1, 1910.

1,047,588, Patented De.17, 1912;"

UNITED STATES PATENT OFFICE.

EMMETT W. STULL, 0F MILWAUKEE, WISCONSIN, ASSIGNOR TO ALLIS-CHALMERS COMPANY, A CORPORATION OF NEW JERSEY.

- COVER-FASTENER;

null whom it may concern:

Be it known that I, EM'im'i'r W, STULL,

a citizen of the United States, residing at Milwaukee, in'tl e county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Cover- Fastehers, of which the followlng 1s a full,

clear, and exact specification;

My invention relates to an improved latch or clamp for holding a movable lid or cover in position. e The object of my invention is to provide a simple, eflicient, and novel latch or clamp for securing and retaining covers n position regardless of the amount of vibration or wear produced in the use either of the ,latch or of the portion of the cover with motorswhich are entirely inclosed or practically so. Such machlnes are usually prowhich-it engages," Y

One important application of my invention is found in connectlonwlth railway vided with openings through the frames or casings by means of which access can be had to the commutator orother parts of the machine. These openings are normally covered by plates or covers which are somewhat larger than the openings'and which are usually' fastened inpositlon b a latch at the respective ends and adap'te to engage projections on the cover. v 4

In order to prevent chattering of the cover when the motor is in operation strips ,of felt are placed between the cover and the main part of the casing, and the latches arrangedto cooperate to hold the cover firmlyin place.

With this arrangement chattering is temporarily prevented, but due to the felt wearing out and being pressed thinner by constant jarring and gettin wet, it is customary to provide means which will automati'cally keep the cover secured tightly to the casing.

By means of this invention, provision is made for effect vely retam ng' a cover 1n position even after it has been .in service a great length of time and without necessitating any particular trouble in adjusting the latch mechanism for' holding the cover. in:

place.

In the accompanying sheet of drawings, Figure 1 is a fragmentary "top elevation of a railway motor equipped.'w1th my invention; and Fig. 2 is a sectional view taken.

along the line 2-2 of Fig. 1.'-

Specification of Letters Patent.

' .Patented Dec.17 ,1912. Applicationfil'ed March 31, 1910. SeriaLNo. 552,693.

With motors, and. especially railway reason an opening provided with a cover 31 is formed in the motorcasing .10. When the 'motor isin operation it, is necessary that the cover 31 be secured tightly to the motor cask ing and fit in a manner to prevent the admission of dust or foreign particles, which would "be injurious to the eflicient' working conditions of'the motor.

The cover 31 is provided withfianges 32 and 33 which form a groove for the reception of some yieldable material such as felt 34. The felt is interposed between the easingand the'cover so that when the latter is secured to the casing there is a sprin'gy efi'ect. Ghattering would occur alsowere it not for the use of some springy material located" between the casing. and cover 31. This cover is further provided. with a pluralityv of forked. end portions or projections 35 and 36, which are located'opposite to each other, and preferably atv the ends of the cover. V

Secured to the casing is'a receptacle 37 which is provided, preferably, with a hollow squared portion 38 for the receptionof a coil spring 39. Passing through this coil spring and through an opening 40 in the 3 upper part of the receptacle 37 is a bolt or plunger Imember'41, which is provided with a head 42 and a threaded portion 43, which is engaged by a special nut 44. On the opposite side of the-casin I have provided a similar spring pressed atch 45which is secured tothe casing by a pivot46 and has a handle 47. These members, which are located onopposite sides of the casing and secured thereto, are adapted'to' engage the forked end portions of the cover 311to secure said cover in position. When the cover is removed from the casing and it is desired to place itback jinto position, the forked end portion 35 is slipped under the nut 44 thus. drawing up the plunger and compressingthe'sprmg 39. The other end of the cover is then placed in position and the latch 45 is swung about its center 46 and is brought iutoengagement. with the forked end portion 36-, also-drawing up the other plunger 41jand compressing the coil spring cover is held firmly. The cover willalways be held closely and firmly secured to the casing'due to the stored energy inthe coil spring 39. i In case the spring becomes weak or the felt becomes worn a-nd it is desired to retain the cover more tightly to the casing, the keyed nuts 44 on the plungers can be adjusted to compress the springs to a greater degree.

It is apparent that the cover 31 can be easily and readily removed and again replaced in a very short time. When the cover is secured in place it is held rigidly and in a manner to preventthe admission ofany undesirable foreign matter By means of. this construction a novel and useful arrangementis obtained.

It is further evident that there may be said receptacles being pivoted thereto, re

silient members located in said receptacles, bolts associated with said resilient members, and threaded adjustable members engaging said bolts and said projections to retain the cover in a fixed position and to vary the effectiveness of said resilient member.

Milwaukee, lVisconsin, March 21, 1910. In testimony'whereof I aflix my signature.

in the presence of two witnesses.

EMMETT W. sTULL. Witnesses':

- CHAS. L.'BYR0N,

Roe. E. STOLL.

Copies of this patent may be obtained 'fo'nfive cents each, by addressing the Commissioner of Patents Washington, D; C. I 

